Thank you for sharing. I too am experiencing low Ferritin and Iron levels post Moderna Covid-19 vaccination. I am a 48 year old former trauma nurse for 9 years, now vascular access nurse for 17 years and have never had anemia, not even with my two full term pregnancies. My first Moderna dose was 8/24/2021. I experienced sever fatigue, heart palpitations and short of breath with minimal exertion. Multiple negative Covid-19 PCR test (I was PCR tested twice a week to be able to work). Second Moderna vaccine 9/21/2021. I experienced the same symptoms as the first dose. This time I had labs drawn. Iron level was 22 (low) with normal ferritin of 9, normal Hgb and Hct. Third Moderna dose 3/2/2022. Repeat labs 7/11/2022 Iron 15, Ferritin 4 Hgb 11.1 Hct 36.9 Severe Iron deficiency anemia. Colonoscopy, endoscopy and pelvic ultrasound scheduled for next week. Capsule endoscopy to follow if the previous exams are normal. I haven't had any abnormal menstrual cycles or GI symptoms. Just the severe fatigue and winded feeling with normal activities and talking. When I googled information on google scholar there are no studies or papers reporting this. Only that the vaccine is less likely to be effective if Iron levels are already low. This seems very coincidental. Hoping for truthful answers for all of us soon.